The VI "source/Utilities/Get All Project Class Paths.vi" makes an attempt to only look at libraries and classes that are "before dependencies", but fails to do so because of what looks like a typo in a regular expression.
The VI searches for
<Item Name="Dependencies" Type="Dependencies"/>
but the actual string in the LabVIEW project file is
"<Item Name="Dependencies" Type="Dependencies">"

In my case the "Get All Project Class Paths.vi" finds some packed project libraries in dependencies which it cannot open and returns error 7
Error 7 occurred at Read from Text File in VITesterUtilities.lvlib:Get All Project Class Paths__jki_vi_tester.vi->VITesterUtilities.lvlib:Find Project Test Objects__jki_vi_tester.vi->Graphical Test Runner - Main UI - .vi